I think the noise is from electromagnetic interference from the
recorder through its plastic back panel. I had the rh-10 on top of
the pb-224 with the adapter cable sandwiched between the two. The
problem somewhat improved when I removed the rh10 from on top of the
pb-224, and the problem disappeared when I repositioned the adaptor
cable so it was not against the back of the recorder. My adapter was
made from a Radio Shack cable, which I will soon be replacing with
something with better shielding.
--- In "John Hartog"
<> wrote:
>
> While using the nt1a's>rolls pb224>mz-rh10 combo, I am noticing a
> periodic noise or distortion that comes about every 23 seconds and
> lasts several seconds. To the ear it sounds as though the background
> hiss gets boosted a couple dBs. Here are a few spectral views of the
> problem.
>
> http://www.rockscallop.org/rh10-pb224-nt1a_noise_a.jpg
>
> http://www.rockscallop.org/rh10-pb224-nt1a_noise_b.jpg
>
> http://www.rockscallop.org/rh10-pb224-nt1a_noise_c.jpg
>
> If anyone has recognizes this phenomenon or has any ideas how to solve
> it, I would be grateful. If this seems too off topic, then please
> respond off list.
>
> John Hartog
>
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